Image forming apparatus and drum unit
First Claim
1. An image forming apparatus, comprising:
- a main housing;
a drum unit detachable from the main housing, the drum unit comprising;
a photosensitive drum assembly;
a bearing supporting the photosensitive drum assembly rotatably; and
a drum frame supporting the bearing; and
an exposure head comprising;
a plurality of light emitters aligned along an axial direction which is a direction of a rotation axis of the photosensitive drum assembly;
a lens array for focusing light from the light emitters on the photosensitive drum assembly; and
a head frame supporting the light emitters and the lens array,wherein the bearing includes;
a contact face being in contact with the exposure head along a direction of an optical axis of the light; and
a face being in contact at least partly with the drum frame in a rotating direction of the photosensitive drum assembly.
1 Assignment
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Accused Products
Abstract
An image forming apparatus, having a photosensitive drum assembly, an exposure head, and a bearing, is provided. The photosensitive drum assembly includes a photosensitive drum and a flange disposed at an end of the photosensitive drum in an axial direction of an axis of the photosensitive drum. The flange contacts an inner surface of the photosensitive drum. The exposure head includes a plurality of light emitters aligned along the axial direction of the photosensitive drum, a lens array focusing light from the light emitters on the photosensitive drum, and a head frame to support the light emitters and the lens array. The bearing has a first contact face to contact the exposure head to define a distance between the lens array and the photosensitive drum along a direction of an optical axis of the light.
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Citations
20 Claims
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1. An image forming apparatus, comprising:
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a main housing; a drum unit detachable from the main housing, the drum unit comprising; a photosensitive drum assembly; a bearing supporting the photosensitive drum assembly rotatably; and a drum frame supporting the bearing; and an exposure head comprising; a plurality of light emitters aligned along an axial direction which is a direction of a rotation axis of the photosensitive drum assembly; a lens array for focusing light from the light emitters on the photosensitive drum assembly; and a head frame supporting the light emitters and the lens array, wherein the bearing includes; a contact face being in contact with the exposure head along a direction of an optical axis of the light; and a face being in contact at least partly with the drum frame in a rotating direction of the photosensitive drum assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A drum unit, comprising:
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a photosensitive drum assembly, the photosensitive drum assembly being exposable to light from an exposure head; a bearing supporting the photosensitive drum assembly rotatably; and a drum frame supporting the bearing, wherein the bearing includes; a contact face being in contact with the exposure head along a direction of an optical axis of the light; and a face being in contact at least partly with the drum frame in a rotating direction to the photosensitive drum assembly. - View Dependent Claims (16, 17, 18, 19)
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20. An image forming apparatus, comprising:
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a photosensitive drum assembly; a bearing supporting the photosensitive drum assembly rotatably; a drum frame supporting the bearing; and an exposure head comprising; a plurality of light emitters aligned along an axial direction which is a direction of a rotation axis of the photosensitive drum assembly; a lens array for focusing light from the light emitters on the photosensitive drum assembly; and a head frame supporting the light emitters and the lens array, wherein the bearing is in contact with the exposure head along a direction of an optical axis of the light and is in contact at least partly with the drum frame in a rotating direction of the photosensitive drum assembly.
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Specification